2.
SUMMARY OF
EM&A REQUIREMENTS AND MONITORING RESULTS
2.1.1
The Quarterly EM&A
programme was undertaken in accordance with the EM&A Manual. It should be
noted that the air quality, noise, water quality and ecology monitoring works
are covered by this contract.
Air quality Monitoring
2.1.2
1-hour Total
Suspended Particulates (TSP) levels should be measured at the designated air
quality monitoring stations to ensure that any deteriorating air quality could
be readily detected and timely action shall be
undertaken to rectify such situation. Impact 1-hour TSP monitoring was
conducted for at least three times every 6 days when the highest dust impact
occurs.
Noise Monitoring
2.1.3
Leq (30min) monitoring
is conducted at least once a week when there are Project-related construction
activities being undertaken within a radius of 300 m from the monitoring
stations. The monitoring is conducted during the construction phase between
0700 and 1900 on normal weekdays at the designated monitoring locations.
Water quality Monitoring
2.1.4
Turbidity (in NTU),
pH, DO (in mg/L and % of saturation), Temperature (in °C), Salinity (in ppt) and Suspended Solids are conducted for three days per week at mid-flood
and mid-ebb with sampling and measurement at the designated monitoring
stations.
Ecology Monitoring
2.1.5
Ardeid night roost
monitoring was conducted once a month in areas within 100 m from the Project
boundary to monitor the effectiveness of proposed mitigation measures and
detect any unpredicted indirect ecological impacts arising from the Project.
2.1.6
Ecological
monitoring of birds was conducted in daytime and night time
periods during the quarter at point count sites and transect routes along the
wetland habitats in Fung Lok Wai and Nam Sang Wai as well as along Shan Pui River and Kam Tin River within 500m from the Project
boundary.
2.2.1
The air quality and
noise monitoring are summarized in Table 2.1. The locations of the air quality and noise monitoring stations shown in
Figure
2 and Figure 3, respectively.
2.2.2
The coordinates of water
quality monitoring locations are summarized in Table 2.2. The locations of the water quality monitoring stations shown in Figure 4.
2.3.1
Graphical
presentation of the monitoring data in the reporting period is presented in Appendix D.
Air quality Monitoring
2.3.2
1-hour TSP impact
monitoring at AM1 and AM2 were carried out in the reporting period, the
monitoring results are reported in the monthly EM&A Report prepared for
this Contract.
2.3.3
No Action and Limit
Level exceedance was recorded for air quality monitoring in the reporting period.
Noise Monitoring
2.3.4
Construction noise
monitoring were carried out in the reporting period, the monitoring results for
CM1, CM2 and CM3 are reported in the monthly EM&A Reports prepared for this
Contract.
2.3.5
No Action and Limit
Level exceedance was recorded for construction noise monitoring in the
reporting period.
2.3.6
No raining and wind
with speed over 5 m/s was observed during noise monitoring according to the
onsite observation.
2.3.7
During the noise
monitoring period, at CM2, road traffic from the squatter house at the west of
Yuen Long STW was observed, at CM3, road traffic from the Nam Sang Wai Road was
observed. No effect that arose from the other factors for CM1 was noted during
the current monitoring period.
Water quality Monitoring
2.3.8
Water quality
monitoring were carried out in the reporting period, the monitoring results for
M1, M2 and M3 are reported in the monthly EM&A Reports prepared for this
Contract.
2.3.9
During the
reporting period, 1 Limit Level exceedance for Dissolved Oxygen, 4 Limit Level
exceedance for Turbidity, 5 Action Level and 2 Limit Level exceedances for
Suspended Solids were recorded. Number of water quality exceedance recorded in
the reporting period at each impact stations is summarized in Table 2.3.
2.3.10
Based on the
finding from the investigation on the recorded case of exceedances, the cause
was found not related to the project. The exceedances may be caused by
influences in the vicinity of the station or changes of the ambient conditions.
The details of Notification of Exceedance are reported in the monthly EM&A Report
prepared for this Contract.
Ecology Monitoring
2.3.11
Ardeid night roost
monitoring and Ecological bird monitoring were carried out in the reporting
period, the monitoring results are reported in the monthly EM&A Reports
prepared for this Contract.
2.3.12
Ardeid night roost
monitoring was carried out in the reporting period. Of the two confirmed ardeid
night roosts (ANR 1 and ANR 2) during the pre-construction survey, both were
active last April 2021. For the months of May and June 2021, only ANR 1 was
observed to be active. No Action / Limit
Level exceedance at NMS1 and NMS2 was recorded during the reporting period.
2.3.13
Ecological bird
monitoring was carried out in the reporting period. 4 exceedances in Action
Level were noted during the period, this include two significant declines in the results of point count method in species
diversity of all avifauna species in the community; and two significant
declines in species diversity of species of conservation importance only.
However, the exceedances were not project-related.
2.4.1
The Action and
Limit Levels for air quality, noise, water quality and ecology monitoring have
been set and are presented in Appendix
C.
2.5.1
The event and
action plans for air quality, noise, water quality and ecology monitoring are
presented in Appendix
E.
2.6.1
The Contractor had
implemented environmental mitigation measures and requirements as stated in the
EIA Report, the EP and EM&A Manual. The implementation status of the
environmental mitigation measures during the reporting period is summarized in Appendix G.